Web Performance Report Using Y-Slow Tool along with Selenium

Web page performance and its causes can be monitored by using Y-slow, a tool which analyses web pages and using a set of rules provides suggestions on how to improve the web page performance.

Manually setting preferences for Y-slow: 

• Open Firefox browser and type about:config
• Search for Y-slow and set the below preferences:extensions.yslow.beaconUrl = http://www.showslow.com/beacon/yslow/
  extensions.yslow.beaconInfo = grade
  extensions.yslow.optinBeacon = true
  extensions.yslow.autorun = true

• Now open the Firefox browser and navigate to any web page.
• Open “http://www.showslow.com” and move to the page under “Last Measurements” tab.
• The URL for your web application and the Y-slow grade would be present in the table. Click on the URL to view the report of your web page.

Setting preferences from Selenium:

• Add the .xpi file for firebug.
  File firebug = new File(“Path to:\\firebug@software.joehewitt.com.xpi“);

• Add the .xpi file for Y-slow.
  File yslow = new File(“Path to:\\yslow@yahoo-inc.com.xpi“);
• Create a firefox profile.
  FirefoxProfile profile = new FirefoxProfile();
• Add the firebug extension.
  profile.addExtension(firebug);
• Add the firebug preferences.
  profile.setPreference(“extensions.firebug.currentVersion”, “2.0”);
  profile.setPreference(“extensions.firebug.addonBarOpened”, true);
  profile.setPreference(“extensions.firebug.console.enableSites”, true);
  profile.setPreference(“extensions.firebug.script.enableSites”, true);
  profile.setPreference(“extensions.firebug.net.enableSites”, true);
  profile.setPreference(“extensions.firebug.previousPlacement”, 1);
  profile.setPreference(“extensions.firebug.allPagesActivation”, “on”);
  profile.setPreference(“extensions.firebug.onByDefault”, true);
  profile.setPreference(“extensions.firebug.defaultPanelName”, “net”);

• Add the yslow extension.
  profile.addExtension(yslow);
• Then set the yslow preferences.
  profile.setPreference(“extensions.yslow.beaconUrl”,     “http://www.showslow.com/beacon/yslow/ “);
  profile.setPreference(“extensions.yslow.beaconInfo”,”grade”);
  profile.setPreference(“extensions.yslow.optinBeacon”,true);
  profile.setPreference(“extensions.yslow.autorun”,true);
• Add the capabilities.
  DesiredCapabilities capabilities = new DesiredCapabilities();
  capabilities.setBrowserName(“firefox”);
  capabilities.setPlatform(org.openqa.selenium.Platform.ANY);
  capabilities.setCapability(FirefoxDriver.PROFILE, profile);
  WebDriver driver = new FirefoxDriver(capabilities);

• Navigate to your application web page using selenium.
• Open “http://www.showslow.com” and move to the page under “Last Measurements” tab for the reports.

 

Written By: – Jaya Mohanty, QA Engineer, Mindfire Solutions

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